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The Emerging Role of the Salt Tolerance-Related Protein in the Abiotic Stress Response of Arabidopsis thaliana
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The Emerging Role of the Salt Tolerance-Related Protein in the Abiotic Stress Response of Arabidopsis thaliana
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The Emerging Role of the Salt Tolerance-Related Protein in the Abiotic Stress Response of Arabidopsis thaliana
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Journal Article
The Emerging Role of the Salt Tolerance-Related Protein in the Abiotic Stress Response of Arabidopsis thaliana
2025
Overview
Abiotic stresses severely impair plant growth and productivity. To counteract stress, plants have evolved intricate strategies, including the induction of stress-responsive proteins. The Arabidopsis thaliana Salt Tolerance-Related Protein (STRP) has recently emerged as a key player in abiotic stress tolerance. STRP is a small, hydrophilic, intrinsically disordered protein that exhibits the potential to adopt distinct conformations depending on the cellular context. STRP is localized in the cytosol and nucleus and is associated with the plasma membrane. Stress induces the subcellular redistribution of STRP, accompanied by a significant increase (up to ten-fold) in its levels due to reduced degradation by the 26S proteasome. Reverse genetics studies have demonstrated that STRP can mitigate the detrimental effects of oxidative stress and participate in modulating stress-related gene expression. Although the exact mechanism of STRP remains unclear, its physicochemical properties suggest a dual role as a molecular shield, interacting with macromolecules without a fixed conformation, and as a binder of specific defense-related client proteins, adopting a defined tertiary structure. This review provides a comprehensive overview of STRP and its emerging role as a multifunctional player in abiotic stress responses, also highlighting its potential for strengthening crop resilience and maintaining agricultural productivity under global climate challenges.
